The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2005
Filed:
Jan. 08, 2004
Koichi Mizuno, Nara, JP;
Koichi Mizuno, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention provides a switching device comprising first to third connection terminals, a first FET provided with a pair of terminals one of which is connected, via a first direct-current blocking capacitive element, to the first connection terminal and the other of which is connected, via another first direct-current blocking capacitive element, to the second connection terminal, and a second FET provided with a pair of terminals one of which is connected, via a second direct-current blocking capacitive element, to the first connection terminal and the other of which is connected, via another second direct-current blocking capacitive element, to the third connection terminal. The channel type of the first FET is the same as the channel type of the second FET. A first bias voltage is applied to a gate of the first FET, and a second bias voltage is applied to both the main terminals of the second FET. In addition, either a voltage having a first given value or a voltage having a second given value is applied, as a first control value, to both the main terminals of the first FET and to a gate of the second FET, thereby establishing switching between a first connection state of electrically connecting the first connection terminal and the second connection terminal with each other and a second connection state of electrically connecting the first connection terminal and the third connection terminal with each other.